JP7068953B2 - Outdoor heat exchanger and heat pump refrigeration cycle using it - Google Patents
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Description
この発明は、たとえばカーエアコンを構成するヒートポンプ式冷凍サイクルの室外熱交換器として用いられる室外熱交換器に関する。 The present invention relates to, for example, an outdoor heat exchanger used as an outdoor heat exchanger of a heat pump type refrigeration cycle constituting a car air conditioner.
この明細書および特許請求の範囲において、図１～図３の上下、左右を上下、左右というものとする。 Within the scope of this specification and claims, the top and bottom and left and right of FIGS. 1 to 3 are referred to as top and bottom and left and right.
ハイブリッド自動車や、電気自動車などの比較的廃熱の少ない車両のカーエアコンを構成するヒートポンプ式冷凍サイクルとして、圧縮機、車室外に配置され、かつ冷房時に圧縮機で圧縮された冷媒から熱を放熱して凝縮させるとともに暖房時に減圧された冷媒に受熱させて蒸発させる室外熱交換器、冷房時に室外熱交換器を通過した冷媒を減圧する第１減圧器、車室内に配置されかつ冷房時に第１減圧器で減圧された冷媒を蒸発させるエバポレータ、エンジンルーム内に配置され、かつ暖房時に圧縮機で圧縮された冷媒からエンジン冷却液に熱を放熱して凝縮させるとともに加熱したエンジン冷却液を車室内の暖房に利用する中間熱交換器、暖房時に中間熱交換器を通過した冷媒を減圧する第２減圧器、およびエンジンルーム内に配置され、かつ冷房時に室外熱交換器を通過した冷媒を気液分離して液相冷媒を第１減圧器に送るとともに暖房時に室外熱交換器を通過した冷媒を気液分離して気相冷媒を圧縮機に送る気液分離／受液装置を備えたものが知られている（特許文献１参照）。 As a heat pump type refrigeration cycle that constitutes a car air conditioner for vehicles such as hybrid vehicles and electric vehicles that have relatively little waste heat, heat is dissipated from the refrigerant that is placed outside the passenger compartment and compressed by the compressor during cooling. An outdoor heat exchanger that condenses and evaporates by receiving heat from the decompressed refrigerant during heating, a first decompressor that decompresses the refrigerant that has passed through the outdoor heat exchanger during cooling, and a first decompressor that is placed in the vehicle interior and during cooling. An evaporator that evaporates the refrigerant decompressed by the decompressor, which is placed in the engine room and dissipates heat from the refrigerant compressed by the compressor during heating to the engine coolant to condense and condense the heated engine coolant in the passenger compartment. The intermediate heat exchanger used for heating, the second decompressor that decompresses the refrigerant that passed through the intermediate heat exchanger during heating, and the refrigerant that was placed in the engine room and passed through the outdoor heat exchanger during cooling is gas-liquid. Those equipped with a gas-liquid separation / liquid receiving device that separates and sends the liquid-phase refrigerant to the first decompressor, separates the refrigerant that has passed through the outdoor heat exchanger during heating, and sends the gas-phase refrigerant to the compressor. It is known (see Patent Document 1).
しかしながら、特許文献１記載のヒートポンプ式冷凍サイクルにおいては、気液分離／受液装置を必要とするので、部品点数が増えるという問題がある。
However, the heat pump type refrigeration cycle described in
この発明の目的は、上記問題を解決し、ヒートポンプ式冷凍サイクルの室外熱交換器として使用した場合に、部品点数の少ないヒートポンプ式冷凍サイクルを実現しうる室外熱交換器を提供することにある。 An object of the present invention is to solve the above problems and to provide an outdoor heat exchanger capable of realizing a heat pump type refrigeration cycle with a small number of parts when used as an outdoor heat exchanger of a heat pump type refrigeration cycle.
本発明は、上記目的を達成するために以下の態様からなる。 The present invention comprises the following aspects in order to achieve the above object.
1)冷房および暖房に利用されるヒートポンプ式冷凍サイクルの室外熱交換器であって、
第１熱交換部と、第１熱交換部の下方に設けられた第２熱交換部と、第１熱交換部の上方に設けられた第３熱交換部とを備え、各熱交換部が入口ヘッダおよび出口ヘッダを有し、第２熱交換部の入口ヘッダが第１熱交換部の出口ヘッダよりも下方に位置するとともに、第３熱交換部の入口ヘッダが第１熱交換部の出口ヘッダよりも上方に位置し、第２熱交換部の入口ヘッダと第３熱交換部の入口ヘッダとが上下方向にのびる中空状気液分離部により通じさせられるとともに、第１熱交換部の出口ヘッダと気液分離部とが通じさせられており、
第１熱交換部の入口ヘッダに冷媒入口が設けられ、第２熱交換部の出口ヘッダに冷房時の冷媒出口が設けられ、第３熱交換部の出口ヘッダに暖房時の冷媒出口が設けられており、
第１熱交換部の出口ヘッダから流出して気液分離部に流入した冷媒が、気液分離部において重力により液相冷媒と気相冷媒とに分離され、液相冷媒が第２熱交換部の入口ヘッダに入り、気相冷媒が第３熱交換部の入口ヘッダに入るようになされている室外熱交換器。
1) An outdoor heat exchanger for heat pump refrigeration cycles used for cooling and heating.
Each heat exchange unit includes a first heat exchange unit, a second heat exchange unit provided below the first heat exchange unit, and a third heat exchange unit provided above the first heat exchange unit. It has an inlet header and an outlet header, the inlet header of the second heat exchange section is located below the outlet header of the first heat exchange section, and the inlet header of the third heat exchange section is the outlet of the first heat exchange section. Located above the header, the inlet header of the second heat exchange section and the inlet header of the third heat exchange section are communicated by the hollow gas-liquid separation section extending in the vertical direction, and the outlet of the first heat exchange section. The header and the gas-liquid separation part are communicated with each other .
A refrigerant inlet is provided in the inlet header of the first heat exchange unit, a refrigerant outlet for cooling is provided in the outlet header of the second heat exchange unit, and a refrigerant outlet for heating is provided in the outlet header of the third heat exchange unit. And
The refrigerant flowing out of the outlet header of the first heat exchange section and flowing into the gas-liquid separation section is separated into a liquid phase refrigerant and a gas phase refrigerant by gravity in the gas-liquid separation section, and the liquid phase refrigerant is separated into the second heat exchange section. An outdoor heat exchanger in which the gas phase refrigerant enters the inlet header of the third heat exchanger and enters the inlet header of the third heat exchanger.
2)第１熱交換部が、長手方向を上下方向に向けた状態で左右方向に間隔をおいて配置された１対の第１ヘッダタンクと、両第１ヘッダタンク間に設けられかつ両第１ヘッダタンク間で冷媒を流す少なくとも１つの第１熱交換パスとを有し、第２熱交換部が、長手方向を上下方向に向けた状態で左右方向に間隔をおいて配置された１対の第２ヘッダタンクと、両第２ヘッダタンク間に設けられかつ両第２ヘッダタンク間で冷媒を流す少なくとも１つの第２熱交換パスとを有し、第３熱交換部が、長手方向を上下方向に向けた状態で左右方向に間隔をおいて配置された１対の第３ヘッダタンクと、両第３ヘッダタンク間に設けられかつ両第３ヘッダタンク間で冷媒を流す少なくとも１つの第３熱交換パスとを有し、
第１熱交換部の一方の第１ヘッダタンクに出口ヘッダが設けられ、第２熱交換部における第１熱交換部の出口ヘッダが設けられた第１ヘッダタンクと同じ側に配置された第２ヘッダタンクに入口ヘッダが設けられ、第３熱交換部における第１熱交換部の出口ヘッダが設けられた第１ヘッダタンクと同じ側に配置された第３ヘッダタンクに入口ヘッダが設けられている上記1)記載の室外熱交換器。
2) The first heat exchange section is provided between a pair of first header tanks and both first header tanks arranged at intervals in the left-right direction with the longitudinal direction facing up and down, and both second. A pair having at least one first heat exchange path for flowing a refrigerant between one header tank, and a pair of second heat exchange portions arranged at intervals in the left-right direction with the longitudinal direction facing up and down. It has at least one second heat exchange path provided between the second header tanks and flowing the refrigerant between the two second header tanks, and the third heat exchange section is oriented in the longitudinal direction. At least one first pair of third header tanks arranged in the vertical direction and spaced apart from each other in the left-right direction, and at least one first tank provided between the third header tanks and flowing the refrigerant between the third header tanks. Has 3 heat exchange paths and
A second header tank is provided on one of the first header tanks of the first heat exchange section, and is arranged on the same side as the first header tank provided with the outlet header of the first heat exchange section in the second heat exchange section. An inlet header is provided in the header tank, and an inlet header is provided in a third header tank arranged on the same side as the first header tank provided with the outlet header of the first heat exchange section in the third heat exchange section. The outdoor heat exchanger described in 1) above.
3)左右いずれか一端側に、長手方向を上下方向に向けるとともに上下両端が閉鎖され、かつ第１熱交換部の第１熱交換パスが通じる第１筒状体と、長手方向を上下方向に向けるとともに上下両端が閉鎖され、かつ第２熱交換部の第２熱交換パスおよび第３熱交換部の第３熱交換パスが通じる第２筒状体とが、第２筒状体が第１筒状体よりも左右方向外側に位置するように配置され、左右いずれか他端側に、長手方向を上下方向に向けるとともに上下両端が閉鎖され、かつ第１～第３熱交換部の第１～第３熱交換パスが通じる第３筒状体が配置され、第２筒状体および第３筒状体の上端が第１筒状体の上端よりも上方に位置するとともに、第２筒状体および第３筒状体の下端が第１筒状体の下端よりも下方に位置し、
第１筒状体に第１熱交換部の出口ヘッダを有する第１ヘッダタンクが設けられ、第２筒状体における第１筒状体の下端よりも下方に位置する部分に第２熱交換部の入口ヘッダを有する第２ヘッダタンクが設けられ、第２筒状体における第１筒状体の上端よりも上方に位置する部分に第３熱交換部の入口ヘッダを有する第３ヘッダタンクが設けられ、第２筒状体における第２熱交換部の第２ヘッダタンクと第３熱交換部の第３ヘッダタンクとの間の部分に気液分離部が設けられており、第３筒状体に、第１熱交換部の他方の第１ヘッダタンク、第２熱交換部の出口ヘッダを有する第２ヘッダタンクおよび第３熱交換部の出口ヘッダを有する第３ヘッダタンクが設けられている上記2)記載の室外熱交換器。
3) To one end of either the left or right side, the longitudinal direction is oriented in the vertical direction, the upper and lower ends are closed, and the first tubular body through which the first heat exchange path of the first heat exchange section is passed, and the longitudinal direction is in the vertical direction. The second tubular body is the first with the second tubular body that is turned and the upper and lower ends are closed and the second heat exchange path of the second heat exchange section and the third heat exchange path of the third heat exchange section are connected. It is arranged so as to be located on the outer side in the left-right direction from the tubular body, and on the other end side of either the left or right side, the longitudinal direction is directed in the vertical direction, both upper and lower ends are closed, and the first to third heat exchange portions are first. A third tubular body through which the third heat exchange path passes is arranged, and the upper ends of the second tubular body and the third tubular body are located above the upper end of the first tubular body, and the second tubular body is formed. The lower ends of the body and the third tubular body are located below the lower end of the first tubular body,
A first header tank having an outlet header of the first heat exchange section is provided in the first tubular body, and a second heat exchange section is provided in a portion of the second tubular body located below the lower end of the first tubular body. A second header tank having an inlet header is provided, and a third header tank having an inlet header of a third heat exchange portion is provided in a portion of the second tubular body located above the upper end of the first tubular body. A gas-liquid separation section is provided between the second header tank of the second heat exchange section and the third header tank of the third heat exchange section in the second tubular body, and the third tubular body is provided. The other first header tank of the first heat exchange unit, the second header tank having the outlet header of the second heat exchange unit, and the third header tank having the outlet header of the third heat exchange unit are provided above. 2) The outdoor heat exchanger described.
4)圧縮機、車室外であるエンジンルームに配置され、かつ冷房時に圧縮機で圧縮された冷媒から熱を放熱して凝縮させるとともに暖房時に減圧された冷媒に受熱させて蒸発させる室外熱交換器、冷房時に室外熱交換器を通過した冷媒を減圧する第１減圧器、車室内に配置されかつ冷房時に第１減圧器で減圧された冷媒を蒸発させるエバポレータ、車室内に配置されかつ暖房時に圧縮機で圧縮された冷媒から放熱して凝縮させる暖房時冷媒凝縮器、および暖房時に暖房時冷媒凝縮器を通過した冷媒を減圧する第２減圧器を備えており、室外熱交換器が、請求項１～３のうちのいずれかに記載の室外熱交換器からなり、
冷房運転モードにおいて、圧縮機で圧縮された冷媒が、室外熱交換器の第１熱交換部の入口ヘッダの冷媒入口を通って第１熱交換部内に流入するとともに第１熱交換部内を流れる間に放熱し、放熱した冷媒が出口ヘッダから流出して気液分離部に流入して気液分離部において重力により液相冷媒と気相冷媒とに分離され、液相冷媒が第２熱交換部の入口ヘッダに入り、第２熱交換部を流れる間に過冷却されて出口ヘッダに入り、冷房時の冷媒出口から流出して第１減圧器を経てエバポレータに送られるようになっており、
暖房運転モードにおいて、圧縮機で圧縮された冷媒が暖房時冷媒凝縮器に送られて暖房時冷媒凝縮器を通過する間に放熱し、放熱した冷媒が第２減圧器で減圧された後に室外熱交換器の第１熱交換部の入口ヘッダを通って第１熱交換部内に流入するとともに第１熱交換部を流れる間に外気から熱を奪って蒸発し、外気から熱を奪った冷媒が出口ヘッダから流出して気液分離部内入り、気液分離部において重力により液相冷媒と気相冷媒とに分離され、気相冷媒が第３熱交換部の入口ヘッダ内に入り、第３熱交換部を流れる間に外気からさらに熱を奪って蒸発して出口ヘッダに入り、暖房時の冷媒出口から流出するようになっているヒートポンプ式冷凍サイクル。
4) An outdoor heat exchanger that is placed in the engine room outside the vehicle interior and dissipates heat from the refrigerant compressed by the compressor during cooling to condense it, and also receives heat from the decompressed refrigerant during heating to evaporate it. A first decompressor that decompresses the refrigerant that has passed through the outdoor heat exchanger during cooling, an evaporator that is placed in the passenger compartment and evaporates the refrigerant that has been decompressed by the first decompressor during cooling, and is placed in the passenger compartment and compressed during heating. The outdoor heat exchanger comprises a heating refrigerant condenser that dissipates heat from the machine-compressed refrigerant and condenses it, and a second decompressor that decompresses the refrigerant that has passed through the heating refrigerant condenser during heating. It consists of the outdoor heat exchanger described in any of 1 to 3.
In the cooling operation mode, while the refrigerant compressed by the compressor flows into the first heat exchange section through the refrigerant inlet of the inlet header of the first heat exchange section of the outdoor heat exchanger and flows through the first heat exchange section. The radiated refrigerant flows out from the outlet header, flows into the gas-liquid separation section, is separated into the liquid phase refrigerant and the gas phase refrigerant by gravity at the gas-liquid separation section, and the liquid phase refrigerant is the second heat exchange section. It enters the inlet header of the
In the heating operation mode, the refrigerant compressed by the compressor is sent to the heating refrigerant condenser and dissipates heat while passing through the heating refrigerant condenser, and the radiated refrigerant is decompressed by the second decompressor and then the outdoor heat. It flows into the first heat exchange section through the inlet header of the first heat exchange section of the exchanger, and while flowing through the first heat exchange section, it takes heat from the outside air and evaporates, and the refrigerant that takes heat from the outside air exits. It flows out from the header and enters the gas-liquid separation section, is separated into the liquid phase refrigerant and the gas phase refrigerant by gravity at the gas-liquid separation section, and the gas phase refrigerant enters the inlet header of the third heat exchange section to exchange the third heat. A heat pump type refrigeration cycle that takes more heat from the outside air while flowing through the section, evaporates, enters the outlet header, and flows out from the refrigerant outlet during heating .
上記1)～3)の室外熱交換器によれば、ヒートポンプ式冷凍サイクルに使用した場合、冷房時には、圧縮機で圧縮された高温高圧の気相冷媒が第１熱交換部の入口ヘッダ内に流入し、第１熱交換部において外気により冷却されて凝縮させられた状態で出口ヘッダ内に入る。第１熱交換部の出口ヘッダ内に入った冷媒は、気液分離部において重力により液相冷媒と気相冷媒とに分離され、液相冷媒が第２熱交換部の入口ヘッダに入って貯められる。第２熱交換部の入口ヘッダ内に貯められた液相冷媒は、第２熱交換部において外気により過冷却された後に出口ヘッダに入り、冷房時冷媒減圧器を経て車室内のエバポレータに送られ、その後圧縮機に送られる。 According to the outdoor heat exchangers 1) to 3) above, when used in a heat pump refrigeration cycle, a high-temperature, high-pressure vapor-phase refrigerant compressed by a compressor is placed in the inlet header of the first heat exchange section during cooling. It flows into the outlet header in a state of being cooled and condensed by the outside air in the first heat exchange section. The refrigerant that has entered the outlet header of the first heat exchange section is separated into a liquid phase refrigerant and a gas phase refrigerant by gravity in the gas-liquid separation section, and the liquid phase refrigerant enters the inlet header of the second heat exchange section and is stored. Be done. The liquid phase refrigerant stored in the inlet header of the second heat exchange section enters the outlet header after being overcooled by the outside air in the second heat exchange section, and is sent to the evaporator in the vehicle interior via the refrigerant decompressor during cooling. , Then sent to the compressor.
一方、暖房時には、圧縮機で圧縮された高温高圧の液相冷媒が、暖房時冷媒凝縮器により冷却されて凝縮させられるとともに暖房時冷媒減圧器により減圧された状態で第１熱交換部の入口ヘッダ内に入り、第１熱交換部において屋外空気に放熱することにより蒸発させられて出口ヘッダ内に入る。第１熱交換部の出口ヘッダ内に入った冷媒は、気液分離部において重力により液相冷媒と気相冷媒とに分離され、気相冷媒が第３熱交換部の入口ヘッダに入る。第３熱交換部の入口ヘッダ内に入った冷媒は、第３熱交換部において外気に放熱した後に出口ヘッダ内に入り、気相冷媒のみが圧縮機に送られる。 On the other hand, during heating, the high-temperature and high-pressure liquid-phase refrigerant compressed by the compressor is cooled and condensed by the heating refrigerant condenser and decompressed by the heating refrigerant decompressor at the inlet of the first heat exchange section. It enters the header and is evaporated by radiating heat to the outdoor air in the first heat exchange section to enter the outlet header. The refrigerant that has entered the outlet header of the first heat exchange section is separated into a liquid phase refrigerant and a gas phase refrigerant by gravity in the gas-liquid separation section, and the gas phase refrigerant enters the inlet header of the third heat exchange section. The refrigerant that has entered the inlet header of the third heat exchange section enters the outlet header after radiating heat to the outside air in the third heat exchange section, and only the vapor phase refrigerant is sent to the compressor.
上述したように、上記1)の室外熱交換器が気液分離機能および受液機能を有しているので、この室外熱交換器を用いたヒートポンプ式冷凍サイクルにおいては、特許文献１記載のヒートポンプ式冷凍サイクルのように気液分離／受液装置を必要とせず、部品点数が少なくなる。しかも、配管等のレイアウトもシンプルになるという効果がある。
As described above, since the outdoor heat exchanger of 1) above has a gas-liquid separation function and a liquid receiving function, the heat pump described in
上記2)および3)の室外熱交換器によれば、上記1)の室外熱交換器を比較的簡単に具体化することが可能になる。 According to the outdoor heat exchangers 2) and 3) above, the outdoor heat exchanger 1) above can be embodied relatively easily.
以下、この発明の実施形態を、図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図１はこの発明による室外熱交換器を室外熱交換器に適用したカーエアコン用のヒートポンプ式冷凍サイクルを概略的に示し、図２は図１のヒートポンプ式冷凍サイクルの冷房運転時の状態を示し、図３は図１のヒートポンプ式冷凍サイクルの暖房運転時の状態を示す。 FIG. 1 schematically shows a heat pump type refrigeration cycle for a car air conditioner in which an outdoor heat exchanger according to the present invention is applied to an outdoor heat exchanger, and FIG. 2 shows a state of the heat pump type refrigeration cycle of FIG. 1 during cooling operation. , FIG. 3 shows the state of the heat pump type refrigeration cycle of FIG. 1 during the heating operation.
以下の説明において、「アルミニウム」という用語には、純アルミニウムの他にアルミニウム合金を含むものとする。 In the following description, the term "aluminum" shall include aluminum alloys in addition to pure aluminum.
図１において、ハイブリッド自動車や、電気自動車のカーエアコンに適用されるヒートポンプ式冷凍サイクル(1)は、冷媒を循環させる冷媒循環路(2)、およびヒートポンプ式冷凍サイクル(1)を冷房運転モードと暖房運転モードとに切り替える図示しない制御装置を備えている。 In FIG. 1, the heat pump type refrigeration cycle (1) applied to a car air conditioner of a hybrid vehicle or an electric vehicle has a refrigerant circulation path (2) for circulating a refrigerant and a heat pump type refrigeration cycle (1) as a cooling operation mode. It is equipped with a control device (not shown) that switches to the heating operation mode.
冷媒循環路(2)には、圧縮機(3)、車室外であるエンジンルームに配置され、かつ冷房時に圧縮機(3)で圧縮された冷媒から熱を放熱して凝縮させるとともに暖房時に減圧された冷媒に受熱させて蒸発させる室外熱交換器(4)、冷房時に室外熱交換器(4)を通過した冷媒を減圧する第１減圧器としての第１膨張弁(5)、車室内に配置されかつ冷房時に第１膨張弁(5)で減圧された冷媒を蒸発させるエバポレータ(6)、車室内に配置されかつ暖房時に圧縮機(3)で圧縮された冷媒から放熱して凝縮させる暖房時冷媒凝縮器(7)、および暖房時に暖房時冷媒凝縮器(7)を通過した冷媒を減圧する第２減圧器としての第２膨張弁(8)が設けられている。エバポレータ(6)および暖房時冷媒凝縮器(7)は、送風機（図示略）により車室内に送られる空気が通る通路を有するハウジング(9)内に、エバポレータ(6)が風上側に位置するように配置されている。 In the refrigerant circulation path (2), the compressor (3) is placed in the engine room outside the vehicle interior, and heat is radiated and condensed from the refrigerant compressed by the compressor (3) during cooling and depressurized during heating. An outdoor heat exchanger (4) that receives heat from the generated refrigerant and evaporates it, a first expansion valve (5) as a first decompressor that decompresses the refrigerant that has passed through the outdoor heat exchanger (4) during cooling, and inside the vehicle interior. An evaporator (6) that is arranged and evaporates the refrigerant decompressed by the first expansion valve (5) during cooling, and heating that dissipates heat and condenses from the refrigerant that is arranged in the vehicle interior and compressed by the compressor (3) during heating. A second expansion valve (8) is provided as a second decompressor for reducing the pressure of the refrigerant that has passed through the hourly refrigerant condenser (7) and the heating refrigerant condenser (7) during heating. The evaporator (6) and the heating refrigerant condenser (7) are provided so that the evaporator (6) is located on the windward side in a housing (9) having a passage through which air sent into the vehicle interior by a blower (not shown) passes. Is located in.
冷媒循環路(2)は、室外熱交換器(4)における冷房時の冷媒出口(4a)とエバポレータ(6)の冷媒入口(6a)とを通じさせる第１管路(11)、エバポレータ(6)の冷媒出口(6b)と圧縮機(3)とを通じさせる第２管路(12)、圧縮機(3)と暖房時冷媒凝縮器(7)の冷媒入口(7a)とを通じさせる第３管路(13)、暖房時冷媒凝縮器(7)の冷媒出口(7b)と室外熱交換器(4)の冷媒入口(4b)とを通じさせる第４管路(14)、および室外熱交換器(4)における暖房時の冷媒出口(4c)と第１管路(11)の中間部とを通じさせる第５管路(15)とを有する。 The refrigerant circulation path (2) is the first pipeline (11) and the evaporator (6) through which the refrigerant outlet (4a) during cooling in the outdoor heat exchanger (4) and the refrigerant inlet (6a) of the evaporator (6) pass through. 2nd pipeline (12) through which the refrigerant outlet (6b) of the (13), the fourth conduit (14) for passing the refrigerant outlet (7b) of the heating refrigerant condenser (7) and the refrigerant inlet (4b) of the outdoor heat exchanger (4), and the outdoor heat exchanger (4). ) Has a fifth conduit (15) through which the refrigerant outlet (4c) during heating and the intermediate portion of the first conduit (11) are passed.
冷媒循環路(2)の第１管路(11)における第５管路(15)の合流点よりもエバポレータ(6)側には、冷房時に冷媒が流れる冷房時冷媒管路(16)、および暖房時に冷媒が流れる暖房時冷媒管路(17)が並列状に設けられている。第４管路(14)には、冷房時に冷媒が流れる冷房時冷媒管路(18)、および暖房時に冷媒が流れる暖房時冷媒管路(19)が並列状に設けられている。 On the evaporator (6) side of the confluence of the fifth line (15) in the first line (11) of the refrigerant circulation line (2), the cooling refrigerant line (16) through which the refrigerant flows during cooling, and The heating refrigerant conduits (17) through which the refrigerant flows during heating are provided in parallel. In the fourth pipeline (14), a cooling refrigerant conduit (18) through which the refrigerant flows during cooling and a heating refrigerant conduit (19) through which the refrigerant flows during heating are provided in parallel.
第１膨張弁(5)は冷媒循環路(2)の第１管路(11)の冷房時冷媒管路(16)に設けられ、第２膨張弁(8)は冷媒循環路(2)の第４管路(14)の暖房時冷媒管路(19)に設けられている。 The first expansion valve (5) is provided in the cooling refrigerant pipe (16) of the first conduit (11) of the refrigerant circulation passage (2), and the second expansion valve (8) is provided in the refrigerant circulation passage (2). It is provided in the heating refrigerant line (19) of the fourth line (14).
冷媒循環路(2)における第１管路(11)への第５管路(15)の合流点に、冷媒の流れ方向を制御する第１三方弁(21)が設けられ、第１管路(11)における冷房時冷媒管路(16)と暖房時冷媒管路(17)との分岐点に、冷媒の流れ方向を制御する第２三方弁(22)が設けられ、第４管路(14)における冷房時冷媒管路(18)と暖房時冷媒管路(19)との分岐点に、冷媒の流れ方向を制御する第３三方弁(23)が設けられている。第１～第３三方弁(21)(22)(23)は制御装置に接続されており、制御装置により第１～第３三方弁(21)(22)(23)が操作されることによって冷媒の流れが適宜切り替えられる。 A first three-way valve (21) for controlling the flow direction of the refrigerant is provided at the confluence of the fifth conduit (15) with the first conduit (11) in the refrigerant circulation path (2), and the first conduit is provided. A second three-way valve (22) for controlling the flow direction of the refrigerant is provided at the branch point between the cooling refrigerant line (16) and the heating refrigerant line (17) in (11), and the fourth line ( A third three-way valve (23) for controlling the flow direction of the refrigerant is provided at the branch point between the cooling refrigerant line (18) and the heating refrigerant line (19) in 14). The first to third three-way valves (21) (22) (23) are connected to the control device, and the control device operates the first to third three-way valves (21) (22) (23). The flow of the refrigerant is switched as appropriate.
以下、室外熱交換器(4)について、詳細に説明する。 Hereinafter, the outdoor heat exchanger (4) will be described in detail.
室外熱交換器(4)は、第１熱交換部(25)、第１熱交換部(25)の下方に設けられた第２熱交換部(26)、第１熱交換部(25)の上方に設けられた第３熱交換部(27)、ならびに第１熱交換部(25)と第２熱交換部(26)および第３熱交換部(27)とに跨って設けられた中空状気液分離部(28)からなる。各熱交換部(25)(26)(27)は、それぞれ入口ヘッダ(29)(30)(31)および出口ヘッダ(32)(33)(34)を有し、第２熱交換部(26)の入口ヘッダ(30)が第１熱交換部(25)の出口ヘッダ(32)よりも下方に位置するとともに、第３熱交換部(27)の入口ヘッダ(31)が第１熱交換部(25)の出口ヘッダ(32)よりも上方に位置している。気液分離部(28)は上下方向にのびる中空状であり、第１熱交換部(25)の出口ヘッダ(32)が気液分離部(28)に通じるとともに、第２熱交換部(26)の入口ヘッダ(30)と第３熱交換部(27)の入口ヘッダ(31)とが気液分離部(28)により通じさせられている。 The outdoor heat exchanger (4) is of the second heat exchange section (26) and the first heat exchange section (25) provided below the first heat exchange section (25) and the first heat exchange section (25). A hollow shape provided above the third heat exchange section (27), and straddling the first heat exchange section (25), the second heat exchange section (26), and the third heat exchange section (27). It consists of a gas-liquid separation part (28). Each heat exchange section (25) (26) (27) has an inlet header (29) (30) (31) and an outlet header (32) (33) (34), respectively, and a second heat exchange section (26). ) Is located below the outlet header (32) of the first heat exchange section (25), and the inlet header (31) of the third heat exchange section (27) is the first heat exchange section. It is located above the exit header (32) of (25). The gas-liquid separation section (28) has a hollow shape extending in the vertical direction, and the outlet header (32) of the first heat exchange section (25) leads to the gas-liquid separation section (28) and the second heat exchange section (26). ) And the inlet header (31) of the third heat exchange section (27) are communicated by the gas-liquid separation section (28).
第１熱交換部(25)は、長手方向を上下方向に向けた状態で左右方向に間隔をおいて配置された１対の第１ヘッダタンク(35)と、両第１ヘッダタンク(35)間に設けられかつ両第１ヘッダタンク(35)間で冷媒を流す少なくとも１つ、ここでは３つの第１熱交換パス(P1)とを有している。第１熱交換部(25)の右側第１ヘッダタンク(35)内が、上端の第１熱交換パス(P1)と中間の第１熱交換パス(P1)との間に設けられた仕切部材(36)により上下方向に並んだ２つの区画に仕切られるとともに、同じく左側第１ヘッダタンク(35)内が、中間の第１熱交換パス(P1)と下端の第１熱交換パス(P1)との間に設けられた仕切部材(36)により上下方向に並んだ２つの区画に仕切られている。右側第１ヘッダタンク(35)の仕切部材(36)よりも上方の区画が入口ヘッダ(29)となっているとともに、左側第１ヘッダタンク(35)の仕切部材(36)よりも下方の区画が出口ヘッダ(32)となっている。また、右側第１ヘッダタンク(35)の仕切部材(36)よりも下方の区画および左側第１ヘッダタンク(35)の仕切部材(36)よりも上方の区画が中間ヘッダ(37)となっている。 The first heat exchange unit (25) is a pair of first header tanks (35) and both first header tanks (35) arranged at intervals in the left-right direction with the longitudinal direction facing up and down. It has at least one, here three first heat exchange paths (P1), provided in between and allowing the refrigerant to flow between the first header tanks (35). The inside of the first header tank (35) on the right side of the first heat exchange section (25) is a partition member provided between the first heat exchange path (P1) at the upper end and the first heat exchange path (P1) in the middle. It is divided into two sections arranged in the vertical direction by (36), and the inside of the left first header tank (35) is also the middle first heat exchange path (P1) and the lower end first heat exchange path (P1). It is divided into two sections arranged in the vertical direction by a partition member (36) provided between the two. The section above the partition member (36) of the right first header tank (35) is the inlet header (29), and the section below the partition member (36) of the left first header tank (35). Is the exit header (32). Further, the section below the partition member (36) of the first header tank (35) on the right side and the section above the partition member (36) of the first header tank (35) on the left side serve as the intermediate header (37). There is.
第２熱交換部(26)は、長手方向を上下方向に向けた状態で左右方向に間隔をおいて配置された１対の第２ヘッダタンク(38)と、両第２ヘッダタンク(38)間に設けられかつ両第２ヘッダタンク(38)間で冷媒を流す少なくとも１つ、ここでは１つの第２熱交換パス(P2)とを有している。第２熱交換部(26)の左側第２ヘッダタンク(38)全体が入口ヘッダ(30)となっているとともに右側第２ヘッダタンク(38)全体が出口ヘッダ(33)となっている。 The second heat exchange section (26) is a pair of second header tanks (38) and both second header tanks (38) arranged at intervals in the left-right direction with the longitudinal direction facing up and down. It has at least one second heat exchange path (P2) provided between them and allowing the refrigerant to flow between the two second header tanks (38). The entire left side second header tank (38) of the second heat exchange section (26) is the inlet header (30), and the entire right side second header tank (38) is the outlet header (33).
第３熱交換部(27)は、長手方向を上下方向に向けた状態で左右方向に間隔をおいて配置された１対の第３ヘッダタンク(39)と、両第３ヘッダタンク(39)間に設けられかつ両第３ヘッダタンク(39)間で冷媒を流す少なくとも１つ、ここでは１つの第３熱交換パス(P3)とを有する。第３熱交換部(27)の左側第３ヘッダタンク(39)全体が入口ヘッダ(31)となっているとともに右側第３ヘッダタンク(39)全体が出口ヘッダ(34)となっている。 The third heat exchange unit (27) is a pair of third header tanks (39) and both third header tanks (39) arranged at intervals in the left-right direction with the longitudinal direction facing up and down. It has at least one, here one third heat exchange path (P3), provided in between and allowing the refrigerant to flow between the two third header tanks (39). The entire left side third header tank (39) of the third heat exchange unit (27) is the inlet header (31), and the entire right side third header tank (39) is the outlet header (34).
図示は省略したが、各熱交換部(25)(26)(27)の熱交換パス(P1)(P2)(P3)は、長手方向を左右方向に向けた状態で上下方向に間隔をおいて配置された複数のアルミニウム製熱交換管と、隣り合う熱交換管どうしの間に配置されたアルミニウム製コルゲートフィンとを有する。 Although not shown, the heat exchange paths (P1) (P2) (P3) of each heat exchange section (25) (26) (27) are spaced vertically with the longitudinal direction facing left and right. It has a plurality of aluminum heat exchange tubes arranged therein and aluminum corrugated fins arranged between adjacent heat exchange tubes.
気液分離部(28)は、第２熱交換部(26)の入口ヘッダ(30)と第３熱交換部(27)の入口ヘッダ(31)との間に設けられている。第１熱交換部(25)の出口ヘッダ(32)と気液分離部(28)とは連通部材(40)を介して通じさせられている。 The gas-liquid separation section (28) is provided between the inlet header (30) of the second heat exchange section (26) and the inlet header (31) of the third heat exchange section (27). The outlet header (32) of the first heat exchange section (25) and the gas-liquid separation section (28) are communicated with each other via a communication member (40).
室外熱交換器(4)の左端側に、長手方向を上下方向に向けるとともに上下両端が閉鎖され、かつ第１熱交換部(25)の全第１熱交換パス(P1)の熱交換管が通じる第１筒状体(41)と、長手方向を上下方向に向けるとともに上下両端が閉鎖され、かつ第２熱交換部(26)の第２熱交換パス(P2)の熱交換管および第３熱交換部(27)の第３熱交換パス(P3)の熱交換管が通じる第２筒状体(42)とが、第２筒状体(42)が第１筒状体(41)よりも左右方向外側に位置するように配置されている。 On the left end side of the outdoor heat exchanger (4), the longitudinal direction is directed in the vertical direction, both upper and lower ends are closed, and the heat exchange tube of all the first heat exchange paths (P1) of the first heat exchange unit (25) is The heat exchange tube and the third heat exchange tube (P2) of the second heat exchange path (P2) of the second heat exchange part (26), with the first tubular body (41) communicating with the first tubular body (41) and the upper and lower ends closed while the longitudinal direction is directed in the vertical direction. The second tubular body (42) through which the heat exchange tube of the third heat exchange path (P3) of the heat exchange unit (27) passes, and the second tubular body (42) from the first tubular body (41). Is also arranged so as to be located on the outside in the left-right direction.
室外熱交換器(4)の右端側に、長手方向を上下方向に向けるとともに上下両端が閉鎖され、かつ第１～第３熱交換部(25)(26)(27)の第１～第３熱交換パス(P1)(P2)(P3)の熱交換管が通じる第３筒状体(43)が配置されている。 To the right end side of the outdoor heat exchanger (4), the longitudinal direction is directed in the vertical direction, both upper and lower ends are closed, and the first to third heat exchangers (25), (26), and (27) are closed. A third tubular body (43) through which the heat exchange tubes of the heat exchange paths (P1), (P2), and (P3) pass is arranged.
第２筒状体(42)および第３筒状体(43)の上下両端はほぼ同一高さ位置にある。また、第２筒状体(42)および第３筒状体(43)の上端が第１筒状体(41)の上端よりも上方に位置するとともに、第２筒状体(42)および第３筒状体(43)の下端が第１筒状体(41)の下端よりも下方に位置している。 The upper and lower ends of the second cylindrical body (42) and the third tubular body (43) are at substantially the same height position. Further, the upper ends of the second tubular body (42) and the third tubular body (43) are located above the upper ends of the first tubular body (41), and the second tubular body (42) and the second tubular body (42) are located above the upper ends. The lower end of the three tubular bodies (43) is located below the lower end of the first tubular body (41).
第１筒状体(41)に第１熱交換部(25)の出口ヘッダ(32)を有する左側第１ヘッダタンク(35)が設けられている。 The first cylindrical body (41) is provided with a left first header tank (35) having an outlet header (32) of the first heat exchange unit (25).
第２筒状体(42)における第１筒状体(41)の下端よりも下方に位置する部分に第２熱交換部(26)の入口ヘッダ(30)を有する左側第２ヘッダタンク(38)が設けられ、第２筒状体(42)における第１筒状体(41)の上端よりも上方に位置する部分に第３熱交換部(27)の入口ヘッダ(31)を有する左側第３ヘッダタンク(39)が設けられ、第２筒状体(42)における第２熱交換部(26)の左側第２ヘッダタンク(38)と第３熱交換部(27)の左側第３ヘッダタンク(39)との間の部分に気液分離部(28)が設けられている。第２筒状体(42)内は全体に１つの空間となっており、当該空間に第２熱交換部(26)の左側第２ヘッダタンク(38)、第３熱交換部(27)の左側第３ヘッダタンク(39)および気液分離部(28)が互いに通じるように設けられている。連通部材(40)は、第１筒状体(41)と第２筒状体(42)との間に配置されている。 Left side second header tank (38) having an inlet header (30) of a second heat exchange unit (26) at a portion of the second tubular body (42) located below the lower end of the first tubular body (41). ) Is provided, and the left side having the inlet header (31) of the third heat exchange unit (27) at a portion of the second tubular body (42) located above the upper end of the first tubular body (41). A three-header tank (39) is provided, and a second header tank (38) on the left side of the second heat exchange unit (26) and a third header on the left side of the third heat exchange unit (27) in the second tubular body (42). A gas-liquid separation portion (28) is provided in a portion between the tank (39) and the tank (39). The inside of the second tubular body (42) is one space as a whole, and the left side second header tank (38) and the third heat exchange part (27) of the second heat exchange part (26) are in the space. The left third header tank (39) and the gas-liquid separation section (28) are provided so as to communicate with each other. The communication member (40) is arranged between the first tubular body (41) and the second tubular body (42).
第３筒状体(43)における第１筒状体(41)の上下両端間に位置する部分に第１熱交換部(25)の入口ヘッダ(29)および右側中間ヘッダ(37)を有する右側第１ヘッダタンク(35)が設けられている。第３筒状体(43)における第１筒状体(41)の下端よりも下方に位置する部分に第２熱交換部(26)の出口ヘッダ(33)を有する右側第２ヘッダタンク(38)が設けられ、第３筒状体(43)における第１筒状体(41)の上端よりも上方に位置する部分に第３熱交換部(27)の出口ヘッダ(34)を有する右側第３ヘッダタンク(39)が設けられている。右側第１ヘッダタンク(35)、右側第２ヘッダタンク(38)および右側第３ヘッダタンク(39)は、第３筒状体(43)を、下端の第１熱交換パス(P1)と第２熱交換パス(P2)との間の高さ位置、および上端の第１熱交換パス(P1)と第３熱交換パス(P3)との間の高さ位置に配置された分割部材(44)を用いて分割することにより設けられている。 The right side having the inlet header (29) and the right intermediate header (37) of the first heat exchange section (25) at the portion of the third tubular body (43) located between the upper and lower ends of the first tubular body (41). A first header tank (35) is provided. The right second header tank (38) having the outlet header (33) of the second heat exchange unit (26) at a portion of the third tubular body (43) located below the lower end of the first tubular body (41). ) Is provided, and the right side having the outlet header (34) of the third heat exchange unit (27) at the portion of the third tubular body (43) located above the upper end of the first tubular body (41). A 3-header tank (39) is provided. The right first header tank (35), the right second header tank (38) and the right third header tank (39) have a third tubular body (43) with a first heat exchange path (P1) at the lower end. 2 Dividing member (44) arranged at a height position between the heat exchange path (P2) and a height position between the first heat exchange path (P1) and the third heat exchange path (P3) at the upper end. ) Is provided by dividing.
上述した構成のヒートポンプ式冷凍サイクル(1)は、制御装置により３つの三方弁(21)(22)(23)が操作されて冷媒の流れ方向が制御されることによって、冷房運転モードと暖房運転モードとに切り替えられる。 In the heat pump type refrigeration cycle (1) having the above-described configuration, the three-way valves (21) (22) (23) are operated by the control device to control the flow direction of the refrigerant, so that the cooling operation mode and the heating operation are performed. It can be switched to the mode.
冷房運転モードにおいては、図２に実線で示すように、冷媒は、冷媒循環路(2)の冷房時冷媒管路(16)を含む第１管路(11)、第２管路(12)、第３管路(13)、冷房時冷媒管路(18)を含む第４管路(14)を流れ、図２に破線で示すように、両暖房時冷媒管路(17)(19)および第５管路(15)には冷媒は流れない。 In the cooling operation mode, as shown by the solid line in FIG. 2, the refrigerant is the first pipe line (11) and the second pipe line (12) including the cooling refrigerant pipe line (16) of the refrigerant circulation line (2). , The third pipe (13), the fourth pipe (14) including the cooling refrigerant pipe (18), and as shown by the broken line in FIG. 2, both heating refrigerant pipes (17) (19). And the refrigerant does not flow in the fifth pipeline (15).
冷房運転モードにおいて、圧縮機(3)で圧縮された冷媒は、暖房時冷媒凝縮器(7)を通過して室外熱交換器(4)の第１熱交換部(25)の入口ヘッダ(29)内に入る。第１熱交換部(25)の入口ヘッダ(29)内に入った冷媒は、すべての第１熱交換パス(P1)を通って外気に放熱して出口ヘッダ(32)に入り、連通部材(40)を通って気液分離部(28)内に入る。 In the cooling operation mode, the refrigerant compressed by the compressor (3) passes through the cooling refrigerant condenser (7) during heating and passes through the inlet header (29) of the first heat exchange section (25) of the outdoor heat exchanger (4). ). The refrigerant that has entered the inlet header (29) of the first heat exchange section (25) dissipates heat to the outside air through all the first heat exchange paths (P1) and enters the outlet header (32), and enters the communication member (communication member (P1). It enters the gas-liquid separation part (28) through 40).
気液分離部(28)内に流入した冷媒は気液混相冷媒であり、当該気液混相冷媒のうち液相冷媒は重力により第２熱交換部(26)の入口ヘッダ(30)内に溜まり、気相冷媒は気液分離部(28)の上部および第３熱交換部(27)に溜まる。第２熱交換部(26)の入口ヘッダ(30)内に溜まった液相冷媒は、第２熱交換パス(P2)を通る間に過冷却されて出口ヘッダ(33)に入る。第２熱交換部(26)の出口ヘッダ(33)内に入った液相冷媒は、冷房時冷媒管路(16)を含む第１管路(11)を通りかつ第１膨張弁(5)で減圧された後にエバポレータ(6)に送られ、車室内に送られる空気から熱を奪って蒸発し、その後第２管路(12)を通って圧縮機(3)に戻される。エバポレータ(6)において熱を奪われた空気は車室内に送られて冷房に供される。 The refrigerant that has flowed into the gas-liquid separation unit (28) is a gas-liquid mixed-phase refrigerant, and of the gas-liquid mixed-phase refrigerant, the liquid-phase refrigerant collects in the inlet header (30) of the second heat exchange unit (26) due to gravity. , The gas-phase refrigerant collects in the upper part of the gas-liquid separation part (28) and in the third heat exchange part (27). The liquid phase refrigerant accumulated in the inlet header (30) of the second heat exchange section (26) is supercooled while passing through the second heat exchange path (P2) and enters the outlet header (33). The liquid phase refrigerant that has entered the outlet header (33) of the second heat exchange section (26) passes through the first conduit (11) including the cooling refrigerant conduit (16) and the first expansion valve (5). After being decompressed in, it is sent to the evaporator (6), which takes heat from the air sent to the passenger compartment and evaporates, and then is returned to the compressor (3) through the second pipeline (12). The air deprived of heat by the evaporator (6) is sent to the passenger compartment and used for cooling.
暖房運転モードにおいては、図３に実線で示すように、冷媒循環路(2)の第５管路(15)、暖房時冷媒管路(17)を含む第１管路(11)、第２管路(12)、第３管路(13)および暖房時冷媒管路(19)を含む第４管路(14)を冷媒が流れ、図３に破線で示すように、冷媒循環路(2)の第１管路(11)における第１三方弁(21)よりも室外熱交換器(4)側の部分、および両冷房時冷媒管路(16)(18)には冷媒は流れない。 In the heating operation mode, as shown by the solid line in FIG. 3, the fifth line (15) of the refrigerant circulation line (2), the first line (11) including the cooling refrigerant line (17), and the second line. Refrigerant flows through the fourth conduit (14) including the conduit (12), the third conduit (13) and the heating refrigerant conduit (19), and as shown by the broken line in FIG. 3, the refrigerant circulation path (2). ), The refrigerant does not flow in the portion on the outdoor heat exchanger (4) side of the first three-way valve (21) in the first conduit (11) and in the refrigerant conduits (16) and (18) during both cooling.
暖房運転モードにおいて、圧縮機(3)で圧縮された冷媒は暖房時冷媒凝縮器(7)に送られ、暖房時冷媒凝縮器(7)を通過する際に車室内に送られる空気に放熱する。暖房時冷媒凝縮器(7)おいて熱を受熱した空気は車室内に送られて暖房に供される。 In the heating operation mode, the refrigerant compressed by the compressor (3) is sent to the heating refrigerant condenser (7) and dissipates heat to the air sent to the passenger compartment when passing through the heating refrigerant condenser (7). .. During heating The air that receives heat in the refrigerant condenser (7) is sent to the passenger compartment for heating.
暖房時冷媒凝縮器(7)を通過した冷媒は、暖房時冷媒管路(19)を含む第４管路(14)を通り、第２膨張弁(8)で減圧された後に室外熱交換器(4)の第１熱交換部(25)の入口ヘッダ(29)内に入る。第１熱交換部(25)の入口ヘッダ(29)内に入った冷媒は、すべての第１熱交換パス(P1)を通る間に外気から熱を奪って蒸発して出口ヘッダ(32)に入り、連通部材(40)を通って気液分離部(28)内に入る。 The refrigerant that has passed through the heating refrigerant condenser (7) passes through the fourth pipeline (14) including the heating refrigerant conduit (19), is depressurized by the second expansion valve (8), and then has an outdoor heat exchanger. Enter the inlet header (29) of the first heat exchange section (25) of (4). The refrigerant that has entered the inlet header (29) of the first heat exchange section (25) takes heat from the outside air and evaporates to the outlet header (32) while passing through all the first heat exchange paths (P1). Enters and enters the gas-liquid separation part (28) through the communication member (40).
気液分離部(28)内に流入した冷媒は気液混相冷媒であり、当該気液混相冷媒のうち液相冷媒は重力により第２熱交換部(26)の入口ヘッダ(30)内に溜まり、気相冷媒は気液分離部(28)の上部および第３熱交換部(27)の入口ヘッダ(31)内に溜まる。第３熱交換部(27)の入口ヘッダ(31)内に溜まった気相冷媒は、第３熱交換パス(P3)を通る間にさらに外気から熱を奪って蒸発し、第３熱交換部(27)の出口ヘッダ(34)に入る。第３熱交換部(27)の出口ヘッダ(34)内に入った気相冷媒は、第５管路(15)、暖房時冷媒管路(17)を含む第１管路(11)を通り、エバポレータ(6)を通過して圧縮機(3)に戻される。 The refrigerant that has flowed into the gas-liquid separation unit (28) is a gas-liquid mixed-phase refrigerant, and of the gas-liquid mixed-phase refrigerant, the liquid-phase refrigerant collects in the inlet header (30) of the second heat exchange unit (26) due to gravity. , The gas-phase refrigerant collects in the upper part of the gas-liquid separation part (28) and in the inlet header (31) of the third heat exchange part (27). The gas phase refrigerant accumulated in the inlet header (31) of the third heat exchange section (27) further takes heat from the outside air and evaporates while passing through the third heat exchange path (P3), and the third heat exchange section Enter the exit header (34) of (27). The gas-phase refrigerant that has entered the outlet header (34) of the third heat exchange unit (27) passes through the fifth pipe (15) and the first pipe (11) including the heating refrigerant pipe (17). , Passes through the evaporator (6) and is returned to the compressor (3).
この発明による室外熱交換器は、比較的廃熱の少ないハイブリッド自動車や電気自動車のカーエアコンを構成するヒートポンプ式冷凍サイクルの室外熱交換器に好適に用いられる。 The outdoor heat exchanger according to the present invention is suitably used for an outdoor heat exchanger of a heat pump type refrigeration cycle constituting a car air conditioner of a hybrid vehicle or an electric vehicle having relatively little waste heat.
(1)：ヒートポンプ式冷凍サイクル
(2)：冷媒循環路
(4)：室外熱交換器
(25)：第１熱交換部
(26)：第２熱交換部
(27)：第３熱交換部
(28)：気液分離部
(29)(30)(31)：入口ヘッダ
(32)(33)(34)：出口ヘッダ
(35)：第１ヘッダタンク
(38)：第２ヘッダタンク
(39)：第３ヘッダタンク
(41)：第１筒状体
(42)：第２筒状体
(43)：第３筒状体
(P1)：第１熱交換パス
(P2)：第２熱交換パス
(P3)：第３熱交換パス
(1): Heat pump type refrigeration cycle
(2): Refrigerant circulation path
(4): Outdoor heat exchanger
(25): First heat exchange unit
(26): Second heat exchange section
(27): Third heat exchange section
(28): Gas-liquid separation part
(29) (30) (31): Entrance header
(32) (33) (34): Exit header
(35): 1st header tank
(38): 2nd header tank
(39): 3rd header tank
(41): First tubular body
(42): Second tubular body
(43): Third tubular body
(P1): 1st heat exchange path
(P2): 2nd heat exchange path
(P3): 3rd heat exchange path
Claims (4)
第１熱交換部と、第１熱交換部の下方に設けられた第２熱交換部と、第１熱交換部の上方に設けられた第３熱交換部とを備え、各熱交換部が入口ヘッダおよび出口ヘッダを有し、第２熱交換部の入口ヘッダが第１熱交換部の出口ヘッダよりも下方に位置するとともに、第３熱交換部の入口ヘッダが第１熱交換部の出口ヘッダよりも上方に位置し、第２熱交換部の入口ヘッダと第３熱交換部の入口ヘッダとが上下方向にのびる中空状気液分離部により通じさせられるとともに、第１熱交換部の出口ヘッダと気液分離部とが通じさせられており、
第１熱交換部の入口ヘッダに冷媒入口が設けられ、第２熱交換部の出口ヘッダに冷房時の冷媒出口が設けられ、第３熱交換部の出口ヘッダに暖房時の冷媒出口が設けられており、
第１熱交換部の出口ヘッダから流出して気液分離部に流入した冷媒が、気液分離部において重力により液相冷媒と気相冷媒とに分離され、液相冷媒が第２熱交換部の入口ヘッダに入り、気相冷媒が第３熱交換部の入口ヘッダに入るようになされている室外熱交換器。 An outdoor heat exchanger for heat pump refrigeration cycles used for cooling and heating.
Each heat exchange unit includes a first heat exchange unit, a second heat exchange unit provided below the first heat exchange unit, and a third heat exchange unit provided above the first heat exchange unit. It has an inlet header and an outlet header, the inlet header of the second heat exchange section is located below the outlet header of the first heat exchange section, and the inlet header of the third heat exchange section is the outlet of the first heat exchange section. Located above the header, the inlet header of the second heat exchange section and the inlet header of the third heat exchange section are communicated by the hollow gas-liquid separation section extending in the vertical direction, and the outlet of the first heat exchange section. The header and the gas-liquid separation part are communicated with each other .
A refrigerant inlet is provided in the inlet header of the first heat exchange unit, a refrigerant outlet for cooling is provided in the outlet header of the second heat exchange unit, and a refrigerant outlet for heating is provided in the outlet header of the third heat exchange unit. And
The refrigerant flowing out of the outlet header of the first heat exchange section and flowing into the gas-liquid separation section is separated into a liquid phase refrigerant and a gas phase refrigerant by gravity in the gas-liquid separation section, and the liquid phase refrigerant is separated into the second heat exchange section. An outdoor heat exchanger in which the gas phase refrigerant enters the inlet header of the third heat exchanger and enters the inlet header of the third heat exchanger.
第１熱交換部の一方の第１ヘッダタンクに出口ヘッダが設けられ、第２熱交換部における第１熱交換部の出口ヘッダが設けられた第１ヘッダタンクと同じ側に配置された第２ヘッダタンクに入口ヘッダが設けられ、第３熱交換部における第１熱交換部の出口ヘッダが設けられた第１ヘッダタンクと同じ側に配置された第３ヘッダタンクに入口ヘッダが設けられている請求項１記載の室外熱交換器。 The first heat exchange section is provided between a pair of first header tanks and both first header tanks arranged at intervals in the left-right direction with the longitudinal direction facing up and down, and both first headers. A pair of first heat exchange paths having at least one first heat exchange path for flowing refrigerant between tanks, with second heat exchange sections arranged laterally spaced apart with the longitudinal direction facing up and down. It has a two-header tank and at least one second heat exchange path provided between the two second header tanks and allowing the refrigerant to flow between the two second header tanks, and the third heat exchange portion is vertically oriented in the longitudinal direction. At least one third heat provided between a pair of third header tanks arranged at intervals in the left-right direction and both third header tanks and in which a refrigerant flows between both third header tanks. Have an exchange pass and
A second header tank is provided on one of the first header tanks of the first heat exchange section, and is arranged on the same side as the first header tank provided with the outlet header of the first heat exchange section in the second heat exchange section. An inlet header is provided in the header tank, and an inlet header is provided in a third header tank arranged on the same side as the first header tank provided with the outlet header of the first heat exchange section in the third heat exchange section. The outdoor heat exchanger according to claim 1.
第１筒状体に第１熱交換部の出口ヘッダを有する第１ヘッダタンクが設けられ、第２筒状体における第１筒状体の下端よりも下方に位置する部分に第２熱交換部の入口ヘッダを有する第２ヘッダタンクが設けられ、第２筒状体における第１筒状体の上端よりも上方に位置する部分に第３熱交換部の入口ヘッダを有する第３ヘッダタンクが設けられ、第２筒状体における第２熱交換部の第２ヘッダタンクと第３熱交換部の第３ヘッダタンクとの間の部分に気液分離部が設けられており、第３筒状体に、第１熱交換部の他方の第１ヘッダタンク、第２熱交換部の出口ヘッダを有する第２ヘッダタンクおよび第３熱交換部の出口ヘッダを有する第３ヘッダタンクが設けられている請求項２記載の室外熱交換器。 On either the left or right end side, the longitudinal direction is oriented in the vertical direction, the upper and lower ends are closed, and the first tubular body through which the first heat exchange path of the first heat exchange section is passed, and the longitudinal direction is oriented in the vertical direction. The upper and lower ends are closed, and the second tubular body is the second tubular body through which the second heat exchange path of the second heat exchange section and the third heat exchange path of the third heat exchange section are connected, and the second tubular body is the first tubular body. It is arranged so as to be located on the outer side in the left-right direction from the body, and on the other end side of either the left or right side, the longitudinal direction is directed in the vertical direction, both upper and lower ends are closed, and the first to third heat exchange portions are closed. A third tubular body through which the three heat exchange paths pass is arranged, and the upper ends of the second tubular body and the third tubular body are located above the upper end of the first tubular body, and the second tubular body and the second tubular body are located. The lower end of the third tubular body is located below the lower end of the first tubular body,
A first header tank having an outlet header of the first heat exchange section is provided in the first tubular body, and a second heat exchange section is provided in a portion of the second tubular body located below the lower end of the first tubular body. A second header tank having an inlet header is provided, and a third header tank having an inlet header of a third heat exchange portion is provided in a portion of the second tubular body located above the upper end of the first tubular body. A gas-liquid separation section is provided between the second header tank of the second heat exchange section and the third header tank of the third heat exchange section in the second tubular body, and the third tubular body is provided. The other first header tank of the first heat exchange unit, the second header tank having the outlet header of the second heat exchange unit, and the third header tank having the outlet header of the third heat exchange unit are provided. Item 2. The outdoor heat exchanger according to Item 2.
冷房運転モードにおいて、圧縮機で圧縮された冷媒が、室外熱交換器の第１熱交換部の入口ヘッダの冷媒入口を通って第１熱交換部内に流入するとともに第１熱交換部内を流れる間に放熱し、放熱した冷媒が出口ヘッダから流出して気液分離部に流入して気液分離部において重力により液相冷媒と気相冷媒とに分離され、液相冷媒が第２熱交換部の入口ヘッダに入り、第２熱交換部を流れる間に過冷却されて出口ヘッダに入り、冷房時の冷媒出口から流出して第１減圧器を経てエバポレータに送られるようになっており、 In the cooling operation mode, while the refrigerant compressed by the compressor flows into the first heat exchange section through the refrigerant inlet of the inlet header of the first heat exchange section of the outdoor heat exchanger and flows through the first heat exchange section. The radiated refrigerant flows out from the outlet header, flows into the gas-liquid separation section, is separated into the liquid phase refrigerant and the gas phase refrigerant by gravity at the gas-liquid separation section, and the liquid phase refrigerant is the second heat exchange section. It enters the inlet header of the
暖房運転モードにおいて、圧縮機で圧縮された冷媒が暖房時冷媒凝縮器に送られて暖房時冷媒凝縮器を通過する間に放熱し、放熱した冷媒が第２減圧器で減圧された後に室外熱交換器の第１熱交換部の入口ヘッダを通って第１熱交換部内に流入するとともに第１熱交換部を流れる間に外気から熱を奪って蒸発し、外気から熱を奪った冷媒が出口ヘッダから流出して気液分離部内入り、気液分離部において重力により液相冷媒と気相冷媒とに分離され、気相冷媒が第３熱交換部の入口ヘッダ内に入り、第３熱交換部を流れる間に外気からさらに熱を奪って蒸発して出口ヘッダに入り、暖房時の冷媒出口から流出するようになっているヒートポンプ式冷凍サイクル。 In the heating operation mode, the refrigerant compressed by the compressor is sent to the heating refrigerant condenser and dissipates heat while passing through the heating refrigerant condenser, and the radiated refrigerant is decompressed by the second decompressor and then the outdoor heat. It flows into the first heat exchange section through the inlet header of the first heat exchange section of the exchanger, and while flowing through the first heat exchange section, it takes heat from the outside air and evaporates, and the refrigerant that takes heat from the outside air exits. It flows out from the header and enters the gas-liquid separation section, is separated into the liquid phase refrigerant and the gas phase refrigerant by gravity at the gas-liquid separation section, and the gas phase refrigerant enters the inlet header of the third heat exchange section to exchange the third heat. A heat pump type refrigeration cycle that takes more heat from the outside air while flowing through the section, evaporates, enters the outlet header, and flows out from the refrigerant outlet during heating.
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